Scale.



No. 810,539. PATENTED JAN. 23, 1906. A. JOBBORN.

SCALE.

APPLICATION FILED MAY3. 1905.

broken away and removed to show the oper- With a certain housing B which extends up- UNITED- STATES.

PATENT oFiIoE.

ARTHUR JOBBORN, OF HAMILTON, CANADA, -A$SIGNOR TO MOSES JOBBORN, OF HAMILTON, CANADA.

SCA

To all whom it may concern:

Be it known that I, ARTHUR JoBBoRN, a citizen of Canada, and a resident of Hamilton, in, the county of Wentworth and Province of Ontario, Canada, have invented new and useful Improvements in Scales, of which the following is a specification.

My invention relates to automatic computing-scales in which a tare-beam and a multiplying-beam are connected by mechanism to certain hand-indicators which are adapted to automatically rise andfall in level and parallel order in order to indicate various weights and values on a stationary chart of the machine.

The objects of my invention are, first, to provide a scale specially ada ted for automatically indicating the weig its and values of articles placed on the platter; second, to provide a scale whereby the weighing and computing capacit can be increased; third, to provide a pendufhm-scale With a multiplying-beain to increase the capacity and a ta'rebeam to weigh independently of the computing mechanism; fourth, to provide a scale with an attached dash-pot adapted to check the vibration of the scale and to impart to the scale a steady and even motion, and, fifth, to afford facilities for the roper adjustment of the operating parts. attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a plan of my improved scale, the platter or pan part of which is almost ating me hanism underneath said platter. Fig. 2 is n elevation of the same, the lower base part and the housin being in section to show the operating mec anism. Fig. 3 is an end elevation showing the scale part of the machine as viewed from the right-hand end thereof, the central stem being broken. Fig. 4 is an enlarged detail sectional elevation of the dash-pot mechanism of the machine. Fi 5 is a detail sectional plan of the chart and ousing. Fig. 6 is a detail elevation of a part of the lever and pendulum.

Similar letters and numerals refer to similar parts throughout the several views.

In the drawings the stand or base part of the scale is indicated by A and is provided Specification of Letters Patent.

Applicationfiled May3,1905. Serial No'. 258,621.

Patented Jan. '23, 1906.

ward and contains a computing-chart C, secured in the upper part of said housing. The front part of the housing B is open in order to ex ose the chart C to view. The rear side of the housing is closed and has a vertical slot D immediately in rear of the middle part of the chart. The. housing 3 also contains a horizontal indicating-arm E adapted to move vertically and .in horizontal line over the face of the chart.

F is a horizontal indicating-arm in rear of the chart and opposite to the front arm E.

The arms E and F are rigidly connected to a vertical stem H in the housing B and which is adapted to be raised and lowered in order that the arm E may indicate weights and values on the face of the chart C and the arm F to indicate weights on the rear side of said chart as viewed through the slot D in the rear of the housing. The face of the chart C is lined and divisioned to indicate values according to weight and price per pound of the load on the platter P and bears suitable lines to be enumerated to indicate weights and prices and is divided into fractional parts of each pound. The rear side of the chart has one column of numerals and divisions similar to the ones on. the face of the chart and viewed through the slot D. The segmental lines 30on the chartC are the same radius as the pivotal centers of the lower rod 12. Any desired number of the lines 30 may be used on the chart C and a suitable number of horizontal lines 31.

The lower part of the housing B is shown broken to indicate that the same may extend in a suitable design to the base A.

P is the platter on which is placed the load to be weighed and has a lower centrally-located hub 2, in which is inserted a vertical stem R, which extends downward and into the base part A. A check-link 3 is pivotally connected to the lower ipart of the stem R, and the opposite end 0 pivotally connected to a strap 4, which is adase A on a V-shaped extension 5 and is capable of being adjusted to said base part by means of set-screws 6 through said strap. The set-screws 6 are adapted to raise or lower the right-hand end of the strap 4, as required. The link 3 and the strap 4 are for the purpose the check-link 3 is' Lustably connected to the under side of the IOO of retaining the vertical stem R vertical position and the platter P level when loaded and in operation.

T represents spider-bearings, which extend a distance downward from the under side of the platter P. (Shown in Fig. 3 of the drawings.) The bearings T rest on the spider-pivots U, which are in transverse line and carry the platter P. In Fig. 2 of the drawings is seen a stationary lug 7, extending above the top of the base A and near to the right-hand side thereof. 'Anadjustable check-strap 8, having a V-pivot 9, which fits agaihst the lug 7 and held in adjusted positlon by means of set-screws 10 above and below said pivot 9. The. set-screws 10 are ada ted to adjust the upper connecting part of t e check-strap 8 toward or awayfrorn the lug 7. In consequence of, the adjustment of the checlr-stra 8 the rod .12, which is pivotally connected to the upper end of the strap 8,1s adjusted. The opposite end of the rod 12 is pivotally connected to the lower end of the vertical stem H.

Thescale-le'ver is indicated by .W and is provided with the usual transversely-extending spider-pivot U and fulcrum-pivot 13. The transverse pivot U supports the bearings T of the platter P, and consequently the ,0 platter. The transverse pivot 13 rests on and is supported by the columns Y, which extend upward from. the base A and are rigid with the base. The two arms or extensions of the lever W, carry the tare-beam 15 and the 3 5 multiplying-beam 17, both side beams being parallel with each other and secured to the lever W. tare-poise 16 is adapted to slide on its beam "i5, the multiplyingpoise i8 is adapted to slide on its beam 17. s The multiplying-poise is used to increase the capacity of the scale in a multiplying form.

20 is the pendulum of the scale 7 adapted to swing on the upper pivot or lugs 22. which fo m part of the u der side the lever W. e lug 23, also on. the under side of lever 'W,

an adulat I 24 with nut and which passes through. tne upper ca t of the pendulum a i of adjus g s- -e to the lug to bring or ad ust the scale to a The rod is to t.

to vertical which ter P, the piston 42 rises.

32 is a cylindrical dash-pot conveniently located and secured to the base A and has a cover 33 and a sleeve 34, which is capable of vertical adjustment on the vertical stem 35. The stem and the sleeve 34 are threaded to suit each other to afiord said vertical adjustment of the sleeve. The upper end of the stem 35 is in clevis form 36, with hole 37 for ivotal connection with the under part of the ever Wand rises and falls with said lever. The upper end 38 of the sleeve 34 is formed as a nut to raise and lower said sleeve on the stem 35. Thelower end 38 of the sleeve 34 is increased in size to allow the increased end 39 of the stem 35 to operate therein. The end part 39 of the stem has a through-slot 40,

which communicates with the interior of the dash-pot 32, and the lower end of the stem 35 has a circular piston 42, which fits into the dash-'pot,.and a centrally-located hole 43 through the piston communicates with the slot 40 and withthe dash-pot. When the dash-pot is partially filled with oilthat is, the lower parallel part thereofthe enlarged part 38 of the sleeve 34 is adapted to close on the piston and cover the slot-opening 40 or to partially cover said slot, as shown. The dash-pot, together with its connected mechanism, as the stem and the sleeve, checks the vibration of the scale while weighing. The upper enlarged part of the dash-pot affords considerable area for the oil in the lower part to flow into should the scale be carried or be in any wise tilted or roughly handled while weighing. When a load is placed on the plat- Therelore the oil on the piston being air-ti ht, causes a partial vacuum below the piston, thereby causing the scale to move somewhat slower than otherwise, therefore preventing the possibility of the scale going beyond the mark and limit springing back. In this case the iston when risingdisplaces the oil under the pis ton. There is no friction in the scale, as

I ve the scale op ate to nicety 1.15

-iction or vibration.

n of the scale is as follows:

to be nannon i lne ocera o T e scale i balanced, the load ighed is placed on the platter P. it u rally goes dhri'nvrard, andthe left-hand the lever l i beyond its iulc urmpi together with the pendul balanced.

toward the 0 ct ll. in 29, until the load As the endulum swings ou ositc side of the fulcrum the Consequently along the beam until the scale is balanced.

The beam 15 is a common scale-beam suitably marked for pounds and ounces-say to ten pounds. The multiplyingpoise is moved on the beam 17, which is suitably marked and notched to enable the user to increase the capacityof the scale and to afiord means for indicatin the weights and values on the illustrated c art (1, as denoted by number of horizontal divisional lines 31, which extend from the segmental lines 30.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a scale, the combination with a ver tically-movable stem, of a scale-pan operatively connected to said stem, a double-faced stationary chart, a housing for said chart having one side open and the other side provided with a vertical slit, and horizontal indicatingarnis connected to the stem and disposed on opposite sides of the chart for observation through the slit and the open side of the housing.

2. In a scale, a fulcrumed lever, a lug on the lever, a pendulum pivotally connected to the lug and in vertical line with said fulcrum, a secondary lug on the lever at right angles with the first lug and in proximity to the pen" dulum, and adjusting means connected to the secondary lug pendulum.

3. ln a scale, the combination with a base and a vertically-movable stem, of an indicator operated by said stern, parallel levers pivoted to the stern one above the other and also pivoted to the base, and a scale-pan supported independently of the stem by said parallel levers, whereby the parallel levers operate the indicator.

a. "in a scale, the combination with a support or base, of a stem, an indicator operated by said stem, parallel levers pivoted to the base whose pivots are located in vertical alinement with each other, a scale-pan pivoted to one of the levers, a rodconnected to the scale-pan, and a link pivoted to the rod in vertical alinement with the point of pivoting the scale-pan to the lever and pivoted to the base in vertical alinement with the point of pivoting the lever to said base.

5. In a scale, the combination with a support or base, of a lever fulcrumed to said base, a scale-pan supported by the lever, a

pendulum pivotally connected to the said lever in vertical alinelnent with the aforesaid fulcrum-point of the lever, and means for adjusting the pendulum laterally to bring the scale to a proper balance.

' ARTHUR JOBBORN.

Witnesses:

JOHN H. HENDRY, MosEs JoBBoRN. 

